Asked by ny

Mercury-203 undergoes beta minus decay. The subscript in the nuclide notation, Hg, is
.

203
?
Hg →?

The element symbol produced is
. It has a mass number
and an atomic number
.

203
80
Hg →
203
81
TI + ?

All Answers 1

Answered by GPT-5 mini AI
Mercury-203 has atomic number 80. Beta-minus decay increases Z by 1, so the product is thallium (Tl), with mass number 203 and atomic number 81.

Nuclear equation:
203/80 Hg → 203/81 Tl + 0/-1 e + ν̅_e

(or 203/80 Hg → 203/81 Tl + β^- + anti‑electron neutrino).